<template>
    <div class="login">
        <el-form
            ref="loginForm"
            :model="loginForm"
            :rules="loginRules"
            class="login-form"
        >
            <h3 class="title">智慧工程管理系统</h3>
            <el-form-item prop="username">
                <el-input
                    v-model="loginForm.username"
                    type="text"
                    auto-complete="off"
                    placeholder="账号"
                >
                    <svg-icon
                        slot="prefix"
                        icon-class="user"
                        class="el-input__icon input-icon"
                    />
                </el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input
                    v-model="loginForm.password"
                    type="password"
                    auto-complete="off"
                    placeholder="密码"
                    @keyup.enter.native="handleLogin"
                >
                    <svg-icon
                        slot="prefix"
                        icon-class="password"
                        class="el-input__icon input-icon"
                    />
                </el-input>
            </el-form-item>
            <el-form-item prop="code">
                <el-input
                    v-model="loginForm.code"
                    auto-complete="off"
                    placeholder="验证码"
                    style="width: 63%"
                    @keyup.enter.native="handleLogin"
                >
                    <svg-icon
                        slot="prefix"
                        icon-class="validCode"
                        class="el-input__icon input-icon"
                    />
                </el-input>
                <div class="login-code">
                    <img :src="codeUrl" @click="getCode" />
                </div>
            </el-form-item>
            <el-checkbox
                v-model="loginForm.rememberMe"
                style="margin:0px 0px 25px 0px;"
                >记住密码</el-checkbox
            >
            <el-form-item style="width:100%;">
                <el-button
                    :loading="loading"
                    size="medium"
                    type="primary"
                    style="width:100%;"
                    @click.native.prevent="handleLogin"
                >
                    <span v-if="!loading">登 录</span>
                    <span v-else>登 录 中...</span>
                </el-button>
            </el-form-item>
        </el-form>
        <!--  底部  -->
        <div class="el-login-footer">
            <span>© 2020 All Rights Reserved. Visu</span>
        </div>
    </div>
</template>

<script>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'

export default {
    name: "Login",
    data () {
        return {
            codeUrl: "",
            cookiePassword: "",
            loginForm: {
                username: "",
                password: "",
                rememberMe: false,
                code: "",
                uuid: ""
            },
            loginRules: {
                username: [
                    { required: true, trigger: "blur", message: "用户名不能为空" }
                ],
                password: [
                    { required: true, trigger: "blur", message: "密码不能为空" }
                ],
                code: [{ required: true, trigger: "change", message: "验证码不能为空" }]
            },
            loading: false,
            redirect: undefined
        };
    },
    watch: {
        $route: {
            handler: function (route) {
                this.redirect = route.query && route.query.redirect;
            },
            immediate: true
        }
    },
    created () {
        this.getCode();
        this.getCookie();
    },
    methods: {
        getCode () {
            getCodeImg().then(res => {
                this.codeUrl = "data:image/gif;base64," + res.img;
                this.loginForm.uuid = res.uuid;
            });
        },
        getCookie () {
            const username = Cookies.get("username");
            const password = Cookies.get("password");
            const rememberMe = Cookies.get('rememberMe')
            this.loginForm = {
                username: username === undefined ? this.loginForm.username : username,
                password: password === undefined ? this.loginForm.password : decrypt(password),
                rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
            };
        },
        handleLogin () {
            this.$refs.loginForm.validate(valid => {
                if (valid) {
                    this.loading = true;
                    if (this.loginForm.rememberMe) {
                        Cookies.set("username", this.loginForm.username, { expires: 30 });
                        Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 });
                        Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
                    } else {
                        Cookies.remove("username");
                        Cookies.remove("password");
                        Cookies.remove('rememberMe');
                    }
                    this.$store
                        .dispatch("Login", this.loginForm)
                        .then(() => {
                            this.$router.push({ path: this.redirect || "/" });
                        })
                        .catch(() => {
                            this.loading = false;
                            this.getCode();
                        });
                }
            });
        }
    }
};
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url("../assets/image/login-background.jpg");
    background-size: cover;
}
.title {
    margin: 0px auto 30px auto;
    text-align: center;
    color: #707070;
}

.login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;
    .el-input {
        height: 38px;
        input {
            height: 38px;
        }
    }
    .input-icon {
        height: 39px;
        width: 14px;
        margin-left: 2px;
    }
}
.login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
}
.login-code {
    width: 33%;
    height: 38px;
    float: right;
    img {
        cursor: pointer;
        vertical-align: middle;
    }
}
.el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
}
</style>
